[jackistall]

1) You can click edit and Move messages to your Junk folder. It doesn't remove them permanently – sorry. Your best bet is to Unsubscribe if they are commercial emails.

2) This is a general rule I use. It may help if you are bothered by commercial email and are looking to filter your inbox.

Log into Gmail. Filter messages that have "Unsubscribe" in the body, and label them as Junk. Also, go to the Inbox settings in Gmail and turn on Override Filters for important messages.

[hsshah]

Thanks for the response. I indeed label them Spam. The problem is Gmail does not then automatically block or filter out new such messages in future (I guess they have some threshold for number of reports or something). Also looked at writing a script to implement a black list myself - however gmail email settings API only available for Google Apps.